B4J Question Error Happened in Resumable Subs not Caught in Application_Error

xulihang

Well-Known Member
Licensed User
Longtime User
I am using Application_Error event to capture all errors. But it cannot capture errors happened in resumable subs. Is there a way to fix this?


B4X: 
Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private xui As XUI
    Private Button1 As B4XView
End Sub

'Return true to allow the default exceptions handler to handle the uncaught exception.
Sub Application_Error (Error As Exception, StackTrace As String) As Boolean
    Log(Error)
    Log(StackTrace)
    Return False
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1")
    MainForm.Show
    wait for (test) complete (done As Object)
End Sub

Private Sub test As ResumableSub
    Sleep(0)
    Dim i As Int = "A"
    Return ""
End Sub

Sub Button1_Click
    xui.MsgboxAsync("Hello World!", "B4X")
End Sub
 
Sort by date Sort by votes
C

Chris2

Active Member
Licensed User
Longtime User
Are you testing this in Release mode?
Application_Error is only called in Release mode, it is not used in Debug
 
Upvote 0

xulihang

Well-Known Member
Licensed User
Longtime User
Upvote 0
P

PaulMeuris

Well-Known Member
Licensed User
The sleep(0) function seems to have an influence on the behavior.
If this function is before the line with the error then the application error subroutine is not executed.
B4X: 
Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private xui As XUI
    Private Button1 As B4XView
End Sub
Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1")
    MainForm.Show
    wait for (test) complete (done As Object)
End Sub
Private Sub test As ResumableSub
    Dim i As Int = "A"               
    Sleep(0)
    Return ""
End Sub
Sub Application_Error (Error As Exception, StackTrace As String) As Boolean
    LogColor(Error,xui.Color_Blue)
    LogColor(StackTrace,xui.Color_Magenta)
    Return False
End Sub
 
Upvote 0

xulihang

Well-Known Member
Licensed User
Longtime User
Chris2 said:
Are you testing this in Release mode?
Application_Error is only called in Release mode, it is not used in Debug
Click to expand...
I am testing in release mode.
 
Upvote 0
C

Chris2

Active Member
Licensed User
Longtime User
PaulMeuris said:
If this function is before the line with the error then the application error subroutine is not executed.
Click to expand...
Good spot!
My guess is that it has something to do with the test sub returning (because of the Sleep(0)) before the line that causes the error.

These two threads may be related:

Application_Error does not fire in resumable subs

It took me hours to figure it out: Application_Error does not fire in resumable subs Test: Private Sub Button1_Click Wait For (crash) Complete (success As Boolean) End Sub Sub crash As ResumableSub Sleep(5000) Dim i As Int = "kjhlkJ" Return True End Sub I found a 4 years old...
www.b4x.com

Application_Error don´t fire on an CustomListView_ItemClick

I have the Application_Error Sub, in the Starter Service. I have an activity with a CustomListView and a button. On this Activity (on release mode) Doing Dim i as int ="abc" to force an error, in the button_click, the Starter Service Application_Error is fired. Doing Dim i as int...
www.b4x.com
 
Upvote 0
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…